Coffee-urn pump



Aug. 28, 1923.

J. T. PEDERSEN COFFEE URN PUMP Filed AprillZ, 1921 Patented Aug. 2S, 1923.

n si r n s rares JOHANNES TH. rnnnasnn, orrLUsr-iiive,itnw Yoan, assrenon fro VAnnen Stoss, 'or NEW venir, iv. Y.

corran-Uran rotar. j?

Application filed. April- V12, 1921. Serial No. 469,856;

State of N ew York, have invented an lm-A provement inCoiiee-Urn Pumps, of whichv they following is a specification. Y

ln'ord'er to obviate the necessity of manually repouring coffee, particularly in the usev of lare-e coffee urnsg'as em lo Yed in hotels restaurants and similar places, it has been proposethas l am aware, to employ a rpump attachment to a coffee -urn a'nd to associate the same with the usual gauge Vglass so that at predetermined intervals as may be necessary the coffee may be pumped from the bottom of the urn and deliveredV thereto at the top thereof passing through the guage glass which thereby serves the purpose not only of normally indicating the'level of the liquid in the cofl'ee urn but also as a passage for the coffee in transferring the same from the bottom to the top of the urn. In the use of these pumps difficulty has been experienced in the pumpibecoming clogged due to the accumulation of coffee grounds or other sediment and the construction -has been such that diiiculty has also been experienced in n cleaning the pump. One of the objects of my invention is, therefore, to overcome this Y dilfic'ulty and in a pump of the class to which the invention relates to providea sediment chamber and screen so arranged that the cof- Afee grounds and sediment cannot pass to the pump, but on the contrary will accumulate in the sediment chamber which is so located that the same may be readily flushed and thereby kept clean so as not to interfere with the operation of the pump. ln pumps of the type to which this in veiition relates it is often desirable for the operator to know when a predetermined quantity of the liquid coffee has been passed through the pump, that is has been conveyed from the bottom of the urn to the top thereof and it is therefore the purpose of this invention to also include an indicating mechanism in conjunction with a coffee urn pump whereby the operator may easily determine when a predetermined quantity of liquid has been caused to pass through the pump from the bottom to the top of the urn.v Such an indicatingdevice consequently is includ-v ed as a part of the present invention, and as illustrated and described it is preferably operated by the means for driving the pump.

The pumpfmadein accordance with my invention is shown in the accompanying drawings,in which,"Y

Fig. 1 is a rear elevation and partial cross` sectioiiof the cofl'ee urn pump.

F ig. 2 is a front elevation with the cover and Avenes removed Vto illustrate the loca-Y tion of the strainer.v

I Fig.A 3 isa central longitudinal oross'sec-4 tion, and

God.

,Figll is a sectional Velevation illustrating i the devices for driving the pump and-the Vmeans for indicating the quantity of liquid handled by vthe pump and actuated by the. driving mechanism. Y f Y 'In the drawing it will be seen that the pump made in accordance with this invention comprises a casing 10. in which there is provided a chamber 11 for the actuatimg,rotorv gears 12 and 13 consisting of a pair of spur gears, although as will be understood Vany suitable type of' rotor gears maybe employed. respectively on shafts 14: and lwhi'ch are journaled in the kcasing of thepump. The

chamber is closed by a cover 16 extendingV over the same and secured in position by bolts 17 -or otherwise passingthrou-gh the cover and also through the flange 18 pro-- vided on the casing for this purpose. In the casing there is an inlet connection 19 preferably: at the lower end thereof v when the same is in an operative position and an-out'- let connection 2O which isv preferably at the upper end thereof when-the pumpis in an operative position. ljn the outlet connec- 'tion a valve cool: 2l is suitably fitted to open and close the passage leading from the pump,

lThe outlet connection is'securedto the lower These' rotors, however, are mounted 80 end of the' gauge glass or tube 22 by aisuitable gland 23 or otherwise and theupper end ofthe gauge glass .is connected to the upper portion of the coffee urn in any usu-a-l manner, while, will be understood, the inlet connection to the pump is suitably coniiected to the lower interior portion of the coffee urn.

t will be understood that the pump may be driven in anv suitable finanner. As illustrated, however, the pump isV driven by a pulley` Y which meshes with a spur gear 26 mounted on the shaft 14 of the vane 12,`the pulley 24' having lint 27 Wh-ie.; ...lltablv tneuntd 211 fitted with an internal gear 25 on a shaft 28 secured to the cover orotherY part of the pump casing so that the Vpulley may be Vturned manually or otherwise to rof tate the spur gear 26 andrtlius turnthe shaft to Voperate the rotors.

` A tthe inner end of the inlet connectioii'19 Vsuitably secured, frictionally or otherwise,

in a recess provided thereforin the Walls of the 'casing l employ a screen 29. Thisniay be made of suitable sheet metalor other Vmaterial and is suitably perforated to permit 'thepassage of the liquid and to prevent the passage of the sediment. The inlet connection 19r is also provided With a branch 30 preferably depending therefrom and toy netherwith the outer end of the passage in,y

' the"V inlet connectionic the pump provides a sediment chamberfl. branch 30 there is a drain cock 32 by meansV Aci Whichivhe'n turned tothe openposition the sediment chamber may bev opened to a discharge. As Will be seen by reterenceto YFigmffthescreen 29 ispref'erably set at an angle to the tace of the Wall of the pump VVwhen* reversed,j is forced through the per chamber so as to provide a pocket 29 Vfora liquid Which7 by the rotors oit the pump forations of the screen into the sediment chamberrto clean the screen and clear the chamber, the rsediment passing out 'through the connection BO It will also be observed VVthat the bore of the inlet 19 is considerably smaller thanthe boreoi" the sediment chamber at'the outer endV or" the inlet and that at vthe inlet orifice l; employ a cross bar 18 which prevents coffee grounds, or other scdit is necessary to keep the sameir-ee fromv Aimeiit en masse, from entering the bore 19- and passino' to the sediment chamber. These f features have been found essential to aV sat- ;isfactor -ivorkino of the )um It Will be l Y furthermore' understood that by this means the pump inlet be cleansed as'o'tten as sediment. l W Y l Inrcoee urn pumps of this type to which fmy' invention relates, it .is Otten desirable and sometimes `necessary for theoperator to be, able to determine the Yquantity oiliquid which has passed through the pump and in order toprovide an indicating mechanism l prefer to employ a tooth suitably connect- Y ed to or made integral With the hub`27 of theY Fitted toVV the pulley 24; and adapted to mesh with a gear Wheel 34 mounted on an extension of the shatt'l so as to turn reelythereon. The gear 34 carries a pulley 35 and this, as, in-

dicated, is fitted with a hub 36 which mounted on the shaft l5 and-inthe periphery of the pulley there is an indicating notch 37. As will be understood in the rey! elution of theV pulley 2tthe tooth 33 engages with the teeth of the gear 34- and the parts may be so designedV that for' af given reyolu! tion of the pulley 35 whereby the notcli37 is returned toan initial positiontlie pump Will handle, or there Will be caused to'pnss through the same, a predetermined quantity o'iliquid', as for example the-.parts may be vdesigned that when the pulleyr has coinpleted 'a revolution a gallon of Vliquid will have passed through the pump; Y i 1 I claimasinyinvention: 1W "1. In a coifeeiirn'pump, a' f easin .9- h an inletrconnection',a screen set `in the casing at an inclination to'thej direction'ot the new oi a liquid therethrough a liner set in the orifice leading` intothe inlet connection, and

said inlet connection and having a restricted a dischargepipe'leading from the saidinlet connection thes aace in the inlet connection betvveen'tne said screen the liner and Y.the interior ofthesaid discharge pipe torining a sediment chamber from which, by the 1 reversal of the pump, Vthe sediment may be discharged.

2. In a coffee urn pump, teasing haring Van inlet connection, a lscreen olacedat an Y"inclination at the discharge YorificeY ot thel inlet connection, a liner of reduced"diamoH` ter iitted in theY outer end vof the inlet connection, a cross bar extendingacross the said inlet member and restricting;` the inlet orifice thereto, and a discharge pipe leading' 'from the in'l'etjconnection, the space Within Vthe inlet connection lying betweenY the said screen and liner and the space yWithin the discharge pipe forming a sediment chamber for preventing sediment. from reachingA the pump and alsofroni which, by the reversal of the pump, the Vsediment may Vbe discharged. Y

Sifrned by meY this 18th day of llarch,V

'gior-munies Tn. rnnniisnn. 

